Rock-cutting machine.



l nocK CUTTING MACHINE.

APPLICATION FILED 1UNE25. IBIS.

Patented Apr. 18, 1916.

2 SHEETS-SHEET I.'

lam-Mull Z- I z vo -E' J. W. COOK.

ROCK cuTnNG mAcHmE.A

APPLICATION FIL-EU1UNE25| 1915.

11,180,014.` Patented Apu 18, 1916.

2 SHEETS-SHET 2.

` gnou/Hop yat JOHN WILLIAM COOK, OF

MIAMI, FLORIDA, ASSIGNORA OF ON-THIRD T0 GEORGE WAIDECK, OF MIAMI,FLORIDA.

ROCK-CUTTING MACHINE.

Specification of Letters Patent.

Patenten apr. is, asie.

Application led .Tune 25, 1915.v Serial No. 36,285.

To all whom t may concern.-

Be it known that I, JOHN -WILLIAM Coon, a `citizen of the United States,residing at Miami, in the county of Dade and State of Florida, haveinvented certain new and usetul Improvements in Rock-Cutting Machines;and I do hereby declare the following to be a fullj clearLand exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to new'and useful improvements in rock cuttingmachines and is more particularly an improvement over my former PatentNo. 1,083,6GG;, issued January 6, 1914, and my object is to provide acutting device comprising a rotary cutter head and a pluralityof cuttingtools having a combined reciprocatory and rotary movement.

A further object is to provide means for readily assembling the parts ofthe cutting device together'.

A further object is to so construct the eutter head and tool holder thatrocks or similar hard substances may readilypass through the cuttingdevice. And afurther object is to provide yielding operatingmeans forthe tool holder.

Other objects and advantages will be hereinafter set forth and moreparticularly pointed out in the accompanying specifica tion.

ln the accompanying drawings which are made a part of this applicationjFigure 1 is aside elevation of the supporting frame and cutting deviceattached thereto. Fig. 2 is a front elevation of the supporting frameand cutting device. Fig. 3 is an enlarged detail perspective view of oneof the pitmen emplo ed for reciprocating the tool holder, showing thecushioning mechanism therefor. Fig. il adetail elevation of the toolholder. Fig. 5 is an enlarged sectional view through the tool holder andcutterhead. Fig. 6 is a top plan view of the cute ting device. showingthe pitmen and rotating shaft in section. Fig. 7 is a bottom plan viewof the cutter head. Fig. 8 is a side elevation thereof. Fig.y 9 is asectional view ot thecutter head as seen on line 9. 9, Fig. S. Fig. 10is a side elevation of a ring member employed for locking the partsofthe cutting device together, and Fig.' 11 is a bottom plan viewthereof. i

Referring to the drawings in which similar reference numerals designatecorresponding parts throughout the several views,'1 indicates asupporting frame which may be constructed in any preferred manner, toone end of which is attached a disk 2. said disk having ears thereon.with which the arms of the frame are secured.

Depending from the peripheral edge ot' the disk Q isa flange el. saidflange having in .its peripheral face a circumferential recess 5, withwhich engages an inwardly extending rib 6, of a collar T. said collarbeing preferably formed ot two semicircular meinbers which are securedtogether by introducing bolts 8 through hollow bosses 9 at the meetingedges of the two sections. The

lower edge of each collar section is provided with a T-slot 10 withwhich engages T-heads 11 on the upper edge of a cutter head 12, theedges'13 of the stems of the T-heads being beveled to receive'thevbeveled faces 1st of the T-slots 10. said beveled portions being soarranged that the collar sections can be quickly` attached thereto orremoved therefrom.

The cutter head 12' comprises a circular shell portion 15, portions ofwhich are cut away to provide passages 16, through which rocks or largeparticlesvmay pass Without interfering withthe operation of the cuttingdevice.

Attached to the lower edge of the shell 5 and preferably integraltherewith'is'a plurality of arms 17 which arms are inclined downwardlyand extended inwardly to the axial center of the cutter head7 said armsat their Ypoint of junction having an opening 1S therethrough which ispreferably square to receive the squared end 19 of a rotating shaft Q()qsaid shaft being provided with an integraler lixed collar 21 which restsupon the inner 'tace of the joining arms so that by extending bolts 22through the collar and joined Vvportions of the arms.y the cutter headwill be securely held in engagement wi. h theshait.

The arms l? form a substantially `.conical spider,'the inner faces ofthe arms having stepped portions 23, through which are formed sockets 24 and through these sockets are adapted to reciprocate cutting tools orchisels 25,-Jfand while I have sho-wn the sockets 24 of square4formation in cross section, it will be readily understood that they canbe of any shape to conform to the shape of the cuttingl bars.

' Slidably mountedupon the shaft 2O within the cutter head 12 is a toolholder 26 which is likewise composed of arms 27 designed to registerwith the arms 17 of the cutter head. The lower edges of said arms have.stepped portions 28 inversely arranged with respect to the steppedportions 23 of the arms y17, rsaid stepped portions having slots 29 intheir lower faces in ywhich are secured the inner ends of the cuttingtools 25, pins 30 being Vextended transversely through the walls of theslots and the interlposed portions of said tools. By arranging thecutting tools in this manner, the tools nearest to the center of thecutter head will f travel ahead of the next succeeding set of tools andthe second set of tools ahead of the next succeeding set, so that thetools `will have a shearing effect when in operation.

By arranging the arms 17 and 27 in substantially spider formation and byproviding the openingl in the shell of the cutter head, any largeparticles, such as stone, or

the like, will readily pass between the arms,' -andto better insuretheifree passage of such obstructions, the upper edges 30 of the arms 27are tapered while the disk 2 is provided with an enlarged opening 3l forthe passage of such partlclesf as may enter through the passage in thecutter head.

lThe tool head 26 .has a central vertical orifice 32, through which therotating shaft 20 passes and in order to reciprocate the tool holder onsaid shaft, the head'33 i's ex-A tended upwardly from the centralportion of the tool holder which head is provided of the slotdetermining the. longitudinal with a peripheral groove 34 to receive acollar 35, said collar having wrist pins 36 thereon to which arepivotally secured one section of the pitmen 37, said pitmen in turnextending through the disk 2 on opposite sides ofthe rotating shaft 20.

'The outer ends of the pitmen sections 37 are entered in sleeves 38 andare' slidably mounted therein, the movement of said pitmen sectionsbeing limited by extending'a headed stud 39 transversely through the endof the pitmen sectionsentering the sleeve and through slots 40 in thesleeve, the length movement of the'pitm'en sections.

Inorder to form a cushion for the pitmen sections, a coiled spring 41 isintroduced into each sleeve .between the closed end of thel sleeve andthe end yof the pitman section,

the tension of the spring being controlled,

by means of an adjustingfserew/LQ which is Extending beyond the closedend of eachy sleeve are a pair of ears 44, between which are pivotallysecured a'pitman section 45,

ythe upper end of the pitman section 45 being secured to a crank shaft46, so that when said crank shaft is rotated the pitmen sections willoperate to `reciprocate the tool head and tools carried thereby, movingthem inwardly and outwardly through the sockets in the arms of thecutter head.

The crank shaft 46 is operatedA on a driving shaft 47 mounted insuitable bearings on the supporting frame l, said driving shaft having abeveled gear 48v which meshes with a beveled gear 49 ona stub shaft 50,said stub shaft extending at right angles to the driving shaft andhaving a gear 51 at the cuter end thereof which gear in turn meshes witha pinion '52 attached to the lcrank shaft 46, and it will be readilyseen -that when the drivingshaft 47 is rotated, the crank shaft 46 willbe likewise rotated through the medium of the beforementioned gears. Therotating shaft 20 is operated by attaching the gear 53 thereto withwhich meshes a pinion 54 on the inner end of the driving shaft 47 andwhen said shaft 20 is rotated, the cutter head 12, ring member 7 andtool holder 26 will be likewise rotated,'while the disk2 and 'partscarrying the same remain A I In operation, the cutter head is positionedf against a surface and power applied to the driving shaft 47, whichwill result in operating the crank shaft 46 and reciprocating the toolholder and tools on the rotating shaft, forcing the sharpened ends ofthe tools into engagement with ,the surface upon which the tools aretooperate. As the tools Amove inwardly and outwardly the'cutter head andparts 'carried thereby are slowly rotated, thereby constantly bringingthe edges of the cutting tools into engagement with the new surface, andin view of the manner in which the cutting tools are positioned theyform a shearing action upon the parts with which they engage.

Should a stone or extreme hard substance be encountered, the force ofthe blow is cushioned from the crank shaft by the ends of the pitmansections 37 striking the springs 41, thus eliminating the jar from thepitmen and parts operating the same. As the particles are loosened bythe cutting tools, they enter through the passages in the shell mettetepered similar tothe edges of the arms 27 so as to give a freer passagefor the particles Within the cutter head casing. Y p

li 1t 1s desired to remove the tool holder or to replace any of thecuttingtools, it is loutv lirv to remove the bolts'S from the lie bosseswhen the two sections of the collar member may be separated. anddisengaged from the T-heads of the cutter head to permit the out iterhead to descend from around the tool holder and tools carried-thereby. Y

lt will be fully understood that although l have shown and described apreferred means ot' operating the toolholder, any suitable means may beemployed for operating the same.' y

l Having thus fully described'my invention what I claim as new anddesire to secure by YLetters Patent is`:-

l. A. cutting device, comprising a disln,

i cess, a cutter head having sockets therein, a

reciprocating tool holder in the'lcutter head, tools carried by the toolholder and adapted `to be moved longitudinally through said sockets, atwo part collar having a rib adapt ed to engage the recess 1n theflange, means to secure the parts of the collar together, and.

interlocking means on the cutter head and Sl'and the bolts 22 from thecollar 21,

collar member to hold the cutter head in fixed engagement With thecollar member.

v2. A'cutting device, comprising a. hollow cutter head, inclinedintegral arms at one end of the head, said arms having steppedportionsthrough Which extend sockets, said cutter head. having passageslbetween the arms, a-tool holder comprising arms having stepped portions*'coperating with the stepped portions of the cutter head, said steppedportions having slots, cutting tools secured in said slots and extendingthrough the sockets of the cutter head, and means to reciprocate thetool holder and tools carried thereby.

3 A cutting device, the combination with a disk'having a dischargeyopening therethrough, a depending flange at the edge'oltl said disksaid iange having a peripheral recess, acutter head having T-headsprojecting therefrom, parts of the Tfheadbeing tapered, a tivo-partcollar having ,lslots, parts of the Walls thereof being tapered'tocoperate with the taper of the ifheads, an internal ribV on the collarfsection adapted to engage -the'recess in the flange, andmeans to Asecurethe collar sections 'together and around said liange.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses. y

, JOHN LLIAM COOK.

Witnesses:

GEO. G. VVALDECK, MARY A. NALL,

@spies et this patent may be obtained for five nente each, by addressingthe "ommsaiener et Entente,

' Washington, D. C."

